小白山陸塊 西南部의 片麻岩複合體의 變成作用에 關한 硏究 = Metamorphism of the Gneiss Complex in the Southwestern Region of the Sobaegsan Massif

다국어 초록 (Multilingual Abstract)

Geology of the southwestern region of the Sobaegsan Massif is composed of various gneisses which are mainly orginated from sedimentary rocks. This gneiss complex is multimetamorphosed and retrograded from upper amphibolite facies (partly granulite facies) to amphibolite facies, and then to epidote-amphibolite facies with partial greenschist facies. Overprinting of three phases of metamorphism and granitization or migmatitization took place in this area can be correlated to the other parts of the Sobaegsan Massif. The first metamorphism took place at Precambrian period. Structures of the studied area are complicated with NS-trending of the fold axis in the western part, and NE-trending in the eastern part compatible with that of regional trend of the Jurassic Daebo orogeny in Korea. Rock composition and variation of elements are discussed. Generally original rock compositions of the gneiss complex are shales & graywackes, and K-metasomatism occurred with regional metamorhism in the area. Chemical variations are compatible with that of the other parts of the Sobaegsan Massif.

목차 (Table of Contents)

• Abstract
• Ⅰ. 序言
• Ⅱ. 一般地質
• Ⅲ. 岩石各論
• Ⅳ. 鑛物組成
• Ⅴ. 地質構造
• Ⅵ. 化學組成
• Ⅶ. 廣域變成作用 및 變成相
• Ⅷ. 結論
• 參考文獻